NXW - Air Conditioning Aermec - Free user manual and instructions

Product type	Water condensing heat pump
Brand	Aermec
Model	NXW
Category	Air conditioning
Main functions	Cooling, heating, simultaneous and separate defrost
User interface	Control panel with 132x64 pixel graphic display and 6 navigation keys
Available menus	Main menu, Quick menu, ON/OFF, Set point, Season, Time slots, Inputs/Outputs, Alarm history
Adjustable parameters	Set points in cooling and heating mode, daily time programming, special periods, special days
Alarms	History of the last 50 alarms with code, date and description
Power supply	Three-phase (not explicitly specified, but typical for this type of equipment)
Dimensions (estimated)	Approximately 1200 x 800 x 1000 mm (without guarantee, typical value for a heat pump of this range)
Weight (estimated)	Approximately 200-300 kg (depending on configuration)
Maintenance and cleaning	Regular cleaning of filters and pressure checks by qualified personnel
Safety	High/low pressure protections, flow switches, magnetic-thermal, antifreeze
Spare parts and repairability	Compressors, pumps, valves, probes, electronic boards available via Aermec network
General information	Automatic restart after power failure with configuration preservation

Frequently Asked Questions - NXW Aermec

How to start the unit from the PGD1 panel?

Access the ON/OFF menu, change the 'Change to' field to ON and confirm with the [←] key.

How to configure the set point in cooling mode?

In the SET POINT menu, select 'Cooling 1' and adjust the value with the + or - keys.

What to do in case of an active alarm?

Press the bell key to display the alarm. To reset, hold the key down for 5 seconds. If the alarm persists, contact support.

How to program daily time slots?

Go to the CLOCK/SLOTS menu, select the day, define the slot starts and choose SET1 or OFF for each mode.

What does the flashing snowflake compressor icon mean?

Flashing icon indicates that the compressor is in start or stop phase, waiting for safety times.

How to view the alarm history?

In the ALARM HISTORY menu, use the + key to navigate through the last 50 alarms sorted by date.

How to change the interface language?

In the SERVICE menu, under LANGUAGE CHANGE, select the desired language and confirm.

What to do if the evaporator flow switch triggers an alarm?

Check the water flow on the evaporator. Input 05 indicates 'Open' if the flow is insufficient. Restore normal flow.

How to view the inlet and outlet water temperatures?

On the main screen, the temperatures 'In.Evap.' and 'Out.Eva.' are displayed continuously.

How to copy time slots from one day to all others?

In the time slot menu, use the 'Copy to' field to select a specific day or 'All days'.

USER MANUAL NXW Aermec

26/03/2010 09:02 In.Evap.: 16.7°C Out.Eva.: 20.5°C C1: i esc pGD' user interface

Pompa di calore condensata ad acqua Electronic adjustment for water-cooled heat pumps

MANUALE USO USAGE MANUAL

AERMEC

COMPANY QUALITY SYSTEM

ISO 9001:2000 - Cert. n° 0128/5

AERMEC S.P.A.

C E

NXW

IT GB FR DE ES

INXWUX - 4437800_00 - 1005

Illustration of a hand interacting with a touchscreen device (no text or symbols visible)

yes bed next page E2C

Electronic adjustment for water-cooled heat pumps

USAGE MANUAL

AERMEC COMPANY QUALITY SYSTEM S ICIM ISO 9001:2000 - Cert. n° 0128/5 CISQ CERTIFIED QUALITY SYSTEM AERMEC S.P.A.

NXW

C €

GB

User interface 3

Menu structure and navigation 4

Use operational procedures ....5

MAIN menu 6

QUICK-MENU parameters....7

ON/OFF MENU parameters....8

Unit switch-on or switch-off from PGD1 panel....8

SET POINT MENU parameters....9

Displays the set point currently in use....9

Setting the work set points for COOLING mode 9

Setting the work set points for HEATING mode 9

COOLING/HEATING menu parameters 10

Setting the functioning mode....10

CLOCK/PERIOD MENU parameters 11

Setting the system date and time 11

Setting the daily time periods 11

Setting SPECIAL PERIODS 12

Setting SPECIAL DAYS 12

INPUTS/OUTPUTS MENU parameters 13

HIGH/LOW pressure transducers analogue inputs 13

Evaporator IN/OUT temperature analogue inputs 13

Condenser OUTPUT temperature analogue inputs 13

Condenser INPUT temperature analogue inputs 14

HIGH/LOW pressure pressure switch status digital inputs 14

Remote commands digital inputs 14

Compressor magnet circuit breaker flow switch digital inputs 15

Compressor 2 magnet circuit breaker digital inputs and compressor phases ...... 15

Evaporators pump magnet circuit breaker digital inputs 15

Condenser flow switch digital inputs 16

Compressors digital outputs 16

Condenser pumps digital outputs 16

Anti-freeze resistance and compressor phases alarm digital outputs ....17

Evaporator pump digital outputs 17

Solenoid valves digital outputs 17

4-way valves digital outputs 18

Historical ALARMS....19

Example of historical alarms 19

AFTER-SALES ASSISTANCE menu 20

Language selection....20

Enabling of language selection on start-up 20

Display of system information 20

Display unit address....21

Display of evaporator pump functioning hours 21

Display of compressors functioning hours 21

Display of condenser pump functioning hours 21

Alarms summary table....22

User interface

The unit control panel allows quick setting of the machine functioning parameters and their display. The display is made up from a graphical matrix with 132 x 64 pixel in order to signal the type of functioning, displaying set pa-

rameters and any alarms that have intervened. All default settings and any modifi cations are memorised in the board. With installation of the PGD1 remote panel, it is possible to replicate all functions and settings available from

the machine at a distance. After a power cut, the unit can re-start automatically keeping the original settings.

The user interface is represented by a graphical display with six keys for navigation. The displays are organised via a hierarchy of menus, which can be activated by pressing the navigation keys. The display default of these menus is represented by the main menu. Navigation among the various parameters takes place using the arrow keys positioned on the right side of the panel. These keys are also used to modify the selected parameters.

15/03/2010 14:30 In.Evap.: 11.1°C out.Eva.: 5.9°C C1:⊗⊗ C2:⊗⊗

• INTERFACE COMMAND KEYS: • MAIN MENU ICONS:

Function Key		Icon Meaning
	ALARMS keyOne press displays the list of active alarms;One prolonged press (at least 5 seconds) resets the active alarm;		Cooling mode activated
			Heating mode activated
	MENU ACTIVATION keyPressing this key activates navigation among the menus;
			Simultaneous defrosting mode activated
	MENU EXIT keyPressing this key goes back to the display of the previous menu;
			Separate defrosting mode activated. This mode is only available for twin-circuit models, in which it is possible to proceed with defrosting engaging just one circuit;
	NAVIGATION key (+)Pressing this key while navigating among the menus/parameters, allows to pass to the next menu/parameter;Pressing this key during modification of a parameter, increases the value of the parameter selected;
	NAVIGATION key (enter)Pressing this key while navigating among the menus, allows to enter the menu selected;Pressing this key during navigation among parameters, allows to select the parameter displayed and enter the modification mode;Pressing this key during modification of a parameter, confirms the modifications to the value of the parameter selected;		• FIXED icon = Compressor OFF;• FLASHING icon = Compressor in switch-on phase, in standby due to safety times;
			• FIXED icon = Compressor ON;• FLASHING icon = Compressor in switch-off phase, in standby due to safety times;
			Compressor forded off;
	NAVIGATION key (-)Pressing this key while navigating among the menus/parameters, allows to pass to the previous menu/parameter;Pressing this key during modification of a parameter, decreases the value of the parameter selected;		Limited compressor;
[4XW8]			Compressor in alarm conditions;
			Access to the "quick menu" by pressing the key

Menu structure and navigation

Navigation in the various menus for the management of the NXW units is represented by the layout shown at the side. In this layout find the representation of the various menus, via

which the unit functions are managed, ordered by sequence and highlighting which function keys must be pressed to navigate among the various menus.

Menu management flowchart covering quick menu, ON/OFF, SET-POINT, SEASON, TIME PERIODS, INPUTS/OUTPUTS, and historical alarm handling steps.

① The fundamental information regarding use of the unit is available in the main menu;

② The quick menu contains some information regarding the cooling circuit and the unit compressors;

③ This menu contains the commands for switching the unit on and off;

④ This menu contains the parameters for setting the work set points for the various functioning modes of the unit;

⑤ This menu contains the parameters for selecting the various functioning modes of the unit;

⑥ This menu contains the parameters for setting the timer periods;

⑦ This menu contains the parameters linked to the management of the inputs and the outputs piloted by the unit boards;

This menu contains the list of the alarms occurring on the unit, ordered by date;

For further details regarding the parameters contained in every menu, please refer to the relative chapters at every menu.

Use operational procedures

To manage or modify the operational parameters of the NXW units, the control panel interface on the machine must be used. The fundamental operations that the user must be able to perform for correct use of the unit are the following:

(1) Pass from one menu to another;
(2) Select and modify a parameter;

1

Pass from one menu to another

(a) In order to scroll the various menus (the order with which the menus are displayed is represented in the previous page) it is first necessary to enter the menu selection mode by pressing the [^A_0] key;

Illustration of a hand interacting with a touchscreen device (no text or symbols visible)

(b) Once the menu selection mode has been entered, scroll these using the arrow keys: the [+] key to pass to the previous menu and the [+] key to pass to the next menu;

next menu next menu

(c) When the desired menu is displayed, press the [ ] key to enter the menu. To exit the menu and go back to the menu selection mode, press the [ ] key;

Enter a menu Exit menu

2

Selecting and modifying a parameter

(a) Once the selected menu has been entered (following the procedure 1) it is possible to scroll the windows that make it up using the arrow keys, using the (+) key to pass to the previous parameter and the (+) key to pass to the next parameter;

parameter menu parameter menu

(c) When the desired parameter is displayed, press the [•] key to enter the parameter. To exit the parameter and go back to the parameter selection mode, press the [•] key;

ATTENTION:

Once a parameter has been selected, by pressing the [•] key, automatically enter the modification mode of that parameter. From this mode it is possible to set the desired values for the parameters, following the procedure below:

[1] pressing the [•] key, a flashing cursor will appear near to the first field of the parameter that can be modified (if fields that can be modified are not displayed, no cursor will appear);
[2] pressing the (+) key or the (-) key, the value of the field will increase or decrease;
[3] by pressing the (←) key, the modifications to the field value will be confirmed, saving it in the memory;

On the basis of the type of parameter selected, the number of fields that can be modified may vary;

Exit from a parameter Enter a parameter

MAIN menu

MAIN menu
Visualisation on unit display Index Display/	Parameter
	A Date and time: this data is only displayed in this window (default window on unit switch-on or during normal functioning).
	B	Evaporator inlet temperature: displays the temperature of the return water to the system;
	C	Evaporator outlet temperature: displays the temperature of the water produced by the machine;
	D	QUICK MENU key: icon that represents access to the quick menu [to access this menu, press the ☑ key];
	E Mode: displays the unit functioning mode: ·Cooling mode [ ✉ ]; ·Heating mode [ ✉ ]; ·Simultaneous defrosting mode [ ✉ ]; ·Separate defrosting mode [ ✉ ];
	F/G	Compressor circuit 1/2 state: the state of the compressors of circuit 1/2 is represented (if the unit envisions two cooling circuits) with an icon (if circuit 1 or 2 is composed of several compressors, an icon is used for every compressor); the icons that can be used are:
		FIXED icon = Compressor OFF; FLASHING icon = Compressor in switch-on phase, in stand-by due to safety times;
		FIXED icon = Compressor ON; FLASHING icon = Compressor in switch-off phase, in stand-by due to safety times;
		Compressor forded off;
		Limited compressor;
		Compressor in alarm conditions;

QUICK-MENU parameters

MAIN MENU - QUICK MENU - Cooling circuit information
Visualisation on unit display Index Display/Parameter
	A	Circuit number: Indicates to which cooling circuit the data displayed refers to.
	B	High pressure: Indicates the high pressure value measured on the cooling circuit; this data is expressed in (bar) but the corresponding temperature data is also displayed.
	C	Low pressure: Indicates the low pressure value measured on the cooling circuit; this data is expressed in (bar) but the corresponding temperature data is also displayed.
	D/E Compressor 1/2 state: Indicates the state of the compressor 1 (of the circuit to which it refers), this state can be one of the following:ON = compressor ON;OFF = compressor OFF;OFF alarm = compressor off due to alarm;OFF stand-by 180s = compressor request but cannot switch-on due to safety times;OFF stand-by 180s = compressor request but cannot switch-on due to safety times;

MAIN MENU - QUICK MENU - General regulation settings
Visualisation on unit display Index Display/Parameter
	A	Unit: Indicates the general parameters with which the unit is set.
	B	Current set point: Indicates the value currently set as work set point.
	C Regulation temperature: Indicates the temperature detected by the probe used (this probe can vary on the basis of the type of functioning).
	D	Partialisation steps requested: Indicates how many compressors are on instant by instant.

ON/OFF MENU parameters

ON/OFF menu - Unit switch-on or switch-off from PGD1 panel
Visualisation on unit display Index Display/Parameter
[3260]Parameters that can be modified by the user	A Unit On/Off: Indicates the ON/OFF state of the unit.
	B Board address: logical address of the board.
	C State: Indicates the current state of the unit.
	D [7/22] Change into: indicates the status in which the unit will be put after the parameter value has been confirmed. Normally the value of this field is in line with that of field (C). To switch-on (if the unit is off) or switch-off (if the unit is on), this field must be modified and the modification confirmed (via the “selection and modification of a parameter” procedure explained in the “Use operational procedure” chapter.

SET POINT MENU parameters

SET POINT menu- Displays the set point currently in use
Visualisation on unit display Index Display/Parameter
	A Set point: Indicates the work temperature.
	B	Current set point: indicates the work set point currently in use on the basis of the envisioned functioning mode.

SET POINT menu - Setting the work set points for COOLING mode
Visualisation on unit display Index Display/Parameter
Parameters that can be modified by the user	A Set point: Indicates the work temperature.
	B	Cooling set point 1: indicates the temperature set with which to make the unit work when cold.
	C Cooling set 2: NOT USED.

2HT]

COOLING/HEATING menu parameters

COOLING/HEATING menu - Setting the functioning mode
Visualisation on unit display Index Display/Parameter
Parameters that can be modified by the user	A Cooling/Heating: Indicates the functioning mode for the unit.
	B	Unit Functioning: indicates the unit functioning mode.

CLOCK/PERIOD MENU parameters

CLOCK/PERIOD menu - Setting the system date and time
Visualisation on unit display Index Display/Parameter
Parameters that can be modified by the user	A Clock: Indicates the date and time of the system
	B Day: indicates the day of the week (on the basis of system settings).
	CDate: Indicates today's date.
	DTime: indicates the current time.

CLOCK/PERIOD menu - Setting the daily time periods
Visualisation on unit display Index Display/Parameter
Parameters that can be modified by the user	A Clock: Indicates the date and time of the system
	B	Day: indicates the day of the week to which the time periods refer, set in the same page.
	C	Copy to: Indicates the possibility of copying the time period settings of the day selected in the field (B), also for the other days (thus preventing having to repeat the same insertion). This option can be used to copy the settings in a single day (selecting the desired day) or for every day of the week.
	D[22CT]	Start time period: indicates the start time of the various time periods (maximum 4 periods daily). It is only specified at the start of the time period as it is considered that the end of a time period coincides with the start of the successive one.
	E / F	Cooling/Heating: indicates the setting used during the specific time period in the cooling or heating mode. Remember that the time periods specified in this menu are used during the winter season (heating mode) and for the summer (cooling mode), therefore on the basis of the mode active on the unit, appropriate settings will be performed. The possible settings both for cooling and heating are:SET1 = unit on and functioning with set point 1 (the coherent set point will be selected on the basis of the season activated);OFF = the unit is switched off;
CLOCK/PERIOD menu - Setting SPECIAL PERIODS
Visualisation on unit display Index Display/Parameter
Parameters that can be modified by the user	A Clock: Indicates the date and time of the system
	B Special periods: indicates a maximum series of three periods (periods mean at least two days) in which a particular behaviour can be programmed.WARNING: the settings introduced as special periods have priority with respect to normal time periods.
	C	Start: Indicates the date of the start of the special period selected (remember that the special period can only be specified within the year in progress, for this reason the date is expressed as a day and month).
	D	End: indicates the date of the end of the special period selected (remember that the special period can only be specified within the year in progress, for this reason the date is expressed as a day and month).
	E / F	Cooling/Heating: indicates the setting used during the specific time period in the cooling or heating mode. Remember that the time periods specified in this menu are used during the winter season (heating mode) and for the summer (cooling mode), therefore on the basis of the mode active on the unit, appropriate settings will be performed. The possible settings both for cooling and heating are:SET1 = unit on and functioning with set point 1 (the coherent set point will be selected on the basis of the season activated);OFF = the unit is switched off,

CLOCK/PERIOD menu - Setting SPECIAL DAYS
Visualisation on unit display Index Display/ Parameter
Parameters that can be modified by the user	A Clock: Indicates the date and time of the system
	B Special days: indicates a series of days when particular behaviour can be programmed.WARNING: the settings introduced as special days have priority with respect to normal time periods and special periods.
	C Start: Indicates the special day selected (remember that the special day can only be specified within the year in progress, for this reason the date is expressed as a day and month).
	D/E Cooling/Heating: indicates the setting used during the specific time period in the cooling or heating mode. Remember that the time periods specified in this menu are used during the winter season (heating mode) and for the summer (cooling mode), therefore on the basis of the mode active on the unit, appropriate settings will be performed. The possible settings both for cooling and heating are:SET1 = unit on and functioning with set point 1 (the coherent set point will be selected on the basis of the season activated);OFF = the unit is switched off,

INPUTS/OUTPUTS MENU parameters

INPUTS/OUTPUTS menu - HIGH/LOW pressure transducers analogue inputs

Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C B1: indicates the value read on the high pressure side of the cooling circuit indicated. This reading is expressed as a pressure value and a temperature value.
	D B2: indicates the value read on the low pressure side of the cooling circuit indicated. This reading is expressed as a pressure value and a temperature value.

INPUTS/OUTPUTS menu - Evaporator IN/OUT temperature analogue inputs

Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C B3: indicates the temperature value of the water in output from the evaporator.
	D B2: indicates the temperature value of the water in input to the evaporator.

INPUTS/OUTPUTS menu - Condenser OUTPUT temperature analogue inputs

Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C B5: indicates the temperature value of the water in output from the condenser.

INPUTS/OUTPUTS menu - Condenser INPUT temperature analogue inputs
Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/exits.
	B	Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C B10: indicates the temperature value of the water in input to the condenser.

INPUTS/OUTPUTS menu - HIGH/LOW pressure pressure switch status digital inputs
Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/ exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C 01: indicates the status of the high pressure switch, mounted on the cooling circuit indicated. The status of this component can be one of the following:Closed = normal working state;Open = maximum pressure threshold exceeded [HIGH PRESSURE alarm];
	D 02: indicates the status of the low pressure switch, mounted on the cooling circuit indicated. The status of this component can be one of the following:Closed = normal working state;Open = minimum pressure threshold exceeded [LOW PRESSURE alarm];

INPUTS/OUTPUTS menu - Remote commands digital inputs
Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/ exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C 03: indicates the status of the digital input with remote ON-OFF function. The status of this input can be one of the following:Closed = unit ON from remote;Open= unit OFF from remote;— = input not used;
	D 04: indicates the status of the digital input with remote ON-OFF function. The status of this input can be one of the following:Closed = COOLING mode set from remote;Open = HEATING mode set from remote;— = input not used;
INPUTS/OUTPUTS menu - Compressor magnet circuit breaker flow switch digital inputs
Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/ exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C 05: indicates the status of the flow switch positioned on the evaporator, the status of this input can be one of the following:Closed = normal functioning;Open = minimum water flow rate threshold exceeded at the evaporator [Flow switch alarm];
	D 06: indicates the status of the compressor magnet circuit breaker indicated, the status of this input can be one of the following:Closed = normal functioning;Open = the compressor load has exceeded the maximum threshold [Compressor magnet circuit breaker alarm];

INPUTS/OUTPUTS menu - Compressor 2 magnet circuit breaker digital inputs and compressor phases
Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C 07: indicates the status of the compressor magnet circuit breaker indicated, the status of this input can be one of the following:Closed = normal functioning;Open = the compressor load has exceeded the maximum threshold (Compressor magnet circuit breaker alarm);
	D 08: indicates the status of the phase control on the compressors, the status of this input can be one of the following:Closed = normal functioning;Open = incorrect phases detected on the compressor indicated (Serious alarm);

INPUTS/OUTPUTS menu - Condenser flow switch digital inputs
Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/exits.
	B	Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C 17:	indicates the status of the flow switch positioned on the condenser, the status of this input can be one of the following:Closed = normal functioning;Open = minimum water flow rate threshold exceeded at the condenser (Flow switch alarm);

INPUTS/OUTPUTS menu - Compressors digital outputs
Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/ exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C/D 01-02: indicates the status of the compressors indicated, the status of these outputs can be one of the following:Closed = compressor ON;Open = compressor OFF;

INPUTS/OUTPUTS menu - Condenser pumps digital outputs
Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/ exits.
	B	Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C/D	05-06: indicates the status of the pumps indicated, the status of these outputs can be one of the following:Closed = pumps ON;Open = pumps OFF;— = pump not present;

INPUTS/OUTPUTS menu - Anti-freeze resistance and compressor phases alarm digital outputs

Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C 07: indicates the status of the digital output linked to the anti-freeze resistance. The status of this output can be one of the following:Closed = normal functioningOpen = Anti-freeze alarm active;
	D 08: indicates the status of the digital output linked to the compressor phases alarm. The status of this output can be one of the following:Closed = compressor phases alarm in progress;Open = no alarm in progress;

INPUTS/OUTPUTS menu - Evaporator pump digital outputs

Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/ exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C 09: indicates the status of the pump indicated, the status of this output can be one of the following:Closed = pump ON;Open = pump OFF;

INPUTS/OUTPUTS menu - Solenoid valves digital outputs

Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C/D 10-11: indicates the status of the solenoid valves indicated, the status of this output can be one of the following:Closed = valve ON;Open =valve OFF;— = valve not present;
INPUTS/OUTPUTS menu - 4-way valves digital outputs
Visualisation on unit display Index Display/Parameter
	A Inputs/Outputs: Indicates the state of the different entries/ exits.
	B Master: indicates the type of data displayed; the displays can be:Analogue inputs;Digital inputs;Digital outputs;
	C/D 12-13: indicates the status of the 4-way valves indicated, the status of this output can be one of the following:Closed = valve ON;Open =valve OFF;— = valve not present;

Historical ALARMS

The alarms historical menu does not contain user parameters like the menus previously explained, but it is possible to scroll the last 50 alarms that have occurred, ordered by data with some information recorded regarding the status of the machine at the time the alarm was triggered.

Navigate this menu by pressing the ( ) key, as the first display represents the last alarm triggered, while the alarm with index 001 represents the oldest alarm memorised.

HISTORICAL ALARMS menu - Example of historical alarms
Visualisation on unit display Index Display
	A Historical alarms: Indicates the alarms recorded in the memory.
	B Date: indicates the time and date when the alarm was triggered.
	C	Index: indicates the index with which the alarm is saved in the memory. The lower the index the older the alarm.
	D Code: indicates the identification code of the alarm (see alarms table)
	E Description: brief description of the alarm.
	F/G	Input-Output: indicates the evaporator water input and output temperature value at the time the alarm in question was triggered.

AFTER-SALES ASSISTANCE menu

The after-sales assistance menu contains some sub-menus that are protected by a password. These sub-menus are not available to the user and their management is only allowed by staff authorised for after-sales assistance of the unit.

AFTER-SALES ASSISTANCE menu - LANGUAGE CHANGE sub-menu - Language selection
Visualisation on unit display Index Display
	A Language: Indicates the system language.
	B Language: indicates which language is set for the display.
	C	Control: indicates the control for modifying the system language.
[7W26] Parameters that can be modified by the user

AFTER-SALES ASSISTANCE menu - LANGUAGE CHANGE sub-menu - Enabling of language selection on start-up
Visualisation on unit display Index Display
	A Language: Indicates the system language.
	B	Control: indicates the possibility to enable or disable the sys-tem language selection at every unit start-up.
	C	Display time: indicates the time within which it will be possible to select the system language during the start window. If the language selection window option is disabled on start-up, this parameter will not be visible.

AFTER-SALES ASSISTANCE menu - INFORMATION sub-menu - Display of system information
Visualisation on unit display Index Display
	A Information: Indicates information regarding the system.
	B This window indicates some information linked to the control system hardware.
AFTER-SALES ASSISTANCE menu - BOARD CHANGE sub-menu - Display of board address
Visualisation on unit display Index Display
	A Board change: Indicates the address of the board.
	B This window indicates the address of the control board.

AFTER-SALES ASSISTANCE menu - HORS WORKED sub-menu - Display of evaporator pump functioning hours
Visualisation on unit display Index Display
	A Hour counter: Indicates the number of hours of work of the components:
	B Evaporator pump 1: indicates how many functioning hours of the pump on the evaporator 1 (if present).
	C Evaporator pump 2: indicates how many functioning hours of the pump on the evaporator 2 (if present).

AFTER-SALES ASSISTANCE menu - HORS WORKED sub-menu - Display of compressors functioning hours
Visualisation on unit display Index Display
	A Hour counter: Indicates the number of hours of work of the components:
	B Circuit 1: Indicates the number of the circuit to which the compressors refer.
	C/D/E	Compressor: indicates how many functioning hours of the compressors present on the unit.

AFTER-SALES ASSISTANCE menu - HORS WORKED sub-menu - Display of condenser pump functioning hours
Visualisation on unit display Index Display
	A Hour counter: Indicates the number of hours of work of the components:
	B Condenser 1 pump: indicates how many functioning hours of the pump on the condenser 1 (if present).
	C Condenser 2 pump: indicates how many functioning hours of the pump on the condenser 2 (if present).

Alarms summary table

The units envision the signalling of the possible unit malfunctions. These signals are indicated by the flashing alarm key (bell) on the left part of the display. If the bell is pressed again it allows to display the alarm in progress. The rearm of these alarms can take place automatically, manually or semi-automatically (on the basis of the type and seriousness of the alarm that has occurred). To reset the alarm message, the bell key must be pressed again (remember that resetting the alarm does not solve the cause that generated it, but just the dis-

play is cancelled). The following table lists the possible errors that the unit can generate, and a brief explanation of the possible causes.

Alarms rearm mode:

Manual rearm mode:

The unit is re-started manually by removing and re-applying the voltage.

Automatic rearm mode:

The unit is re-started automatically.

Semi-automatic rearm mode:

The unit is re-started automatically if the alarm repeats a maximum of three times consecutively, after which any new alarm blocks the unit and makes manual rearm necessary.

ALARMS summary table
Alarm code Rearm Description
ALG01		Clock board broken or not connected
ALG02		Memory expansion damaged
ALR03 Serious digit out alarm
AL004		Slave off-line
ALA05		Circuit 1 high pressure probe broken or not connected
ALA06		Circuit 2 high pressure probe broken or not connected
ALA07		Circuit 3 high pressure probe broken or not connected
ALA08 Circuit 4 high pressure probe broken or not connected
ALA09		Circuit 1 low pressure probe broken or not connected
ALA10 Circuit 2 low pressure probe broken or not connected
ALA11		Circuit 3 low pressure probe broken or not connected
ALA12		Circuit 4 low pressure probe broken or not connected
ALA13 Evaporator water temperature probe broken or not connected
ALA14	[YSKK]	Condenser input water temperature probe broken or not connected
ALA15		Evaporator output water temperature probe broken or not connected
ALA16 Evaporator water temperature probe 1 broken or not connected
ALA17		Evaporator output water temperature probe 2 broken or not connected
ALA18 Evaporator water temperature probe 3 broken or not connected
ALA19		Evaporator output water temperature probe 4 broken or not connected
ALA20 Condenser water temperature probe 1 broken or not connected
ALA21		Condenser output water temperature probe 2 broken or not connected
ALA22		Condenser output water temperature probe 3 broken or not connected
ALA23 Condenser water temperature probe 4 broken or not connected
ALA24 Evaporator temperature probe broken or not connected
ALA25		External temperature probe broken or not connected
ALT26		Compressor 1 - circuit 1 maintenance requested
ALT26 Compressc rcuit 1 maintenance requested
ALT26		Compressor 3 - circuit 1 maintenance requested
ALT26 Compressc rcuit 2 maintenance requested
ALT26		Compressor 2 - circuit 2 maintenance requested
ALT26		Compressor 3 - circuit 2 maintenance requested
ALT26 Compressc [YHSK] rcuit 3 maintenance requested
ALT26		Compressor 2 - circuit 3 maintenance requested
ALT26 Compress( ) circuit 3 maintenance requested
ALT26		Compressor 1 - circuit 4 maintenance requested
ALT26 Compress( ) circuit 4 maintenance requested
ALT26		Compressor 3 - circuit 4 maintenance requested
ALT27 Unit 1 con( ) fan maintenance request
ALT27 Unit 2 con( ) fan maintenance request
ALT28		Condenser 1 pump maintenance request
ALT28 Condenser ( ) pump maintenance request
ALT29		Evaporator 1 pump maintenance request
ALT29 Condenser ( ) pump maintenance request
ALC30		Compressor 1 circuit 1 magnet-circuit breaker
ALC30 Compress( ) circuit 1 magnet-circuit breaker
ALC30		Compressor 3 circuit 1 magnet-circuit breaker
ALC30		Compressor 1 circuit 2 magnet-circuit breaker
ALC30 Compress( ) circuit 2 magnet-circuit breaker
ALC30		Compressor 3 circuit 2 magnet-circuit breaker
ALC30 Compress( ) circuit 3 magnet-circuit breaker
ALC30	[TDHS]	Compressor 2 circuit 3 magnet-circuit breaker
ALC30 Compress( ) circuit 3 magnet-circuit breaker
ALC30		Compressor 1 circuit 4 magnet-circuit breaker
ALC30 Compress( ) circuit 4 magnet-circuit breaker
Tabella riassuntiva ALLARMI
Codice allarme Riarmo Descrizione
ALC30		Magneto termico compressore 3 circuito 4
ALW31 Compress	uito 1 forzati in OFF per antigelo
ALW31		Compressori circuito 2 forzati in OFF per antigelo
ALW31 Compress	uito 3 forzati in OFF per antigelo
ALW31		Compressori circuito 4 forzati in OFF per antigelo
ALW32 Circuito 1	rinamento per tempo massimo
ALW32 Circuito 2	rinamento per tempo massimo
ALW32		Circuito 3 fine sbrinamento per tempo massimo
ALW32 Circuito 4	rinamento per tempo massimo
ALW33		Circuito 1 fine pump-down per tempo massimo
ALW33 Circuito 2	mp-down per tempo massimo
ALW33		Circuito 3 fine pump-down per tempo massimo
ALW33 Circuito 4	mp-down per tempo massimo
ALB34		Bassa pressione da pressostato circuito 1
ALB34		Bassa pressione da pressostato circuito 2
ALB34 Bassa pres	da pressostato circuito 3
ALB34		Bassa pressione da pressostato circuito 4
ALB35 Bassa pres	da sonda circuito 1
ALB35		Bassa pressione da sonda circuito 2
ALB35 Bassa pres	da sonda circuito 3
ALB35		Bassa pressione da sonda circuito 4
ALB36 Alta pressi	pressostato circuito 1
ALARMS summary table
Alarm code Rearm Description
ALB36		Circuit 2 high pressure from pressure switch
ALB36 Circuit 3 hi	ssure from pressure switch
ALB36		Circuit 4 high pressure from pressure switch
ALB36 High press [wcwc]	m circuit 1 probe
ALB36		High pressure from circuit 2 probe
ALB36 High press	m circuit 3 probe
ALB36 High press	m circuit 4 probe
ALP38		Evaporator pump 1 no flow warning
ALP39 Evaporator	2 no flow warning
ALP40		Evaporator pump 1 no flow
ALP41 Evaporator	2 no flow
ALP42		Evaporator pimp 1 magnet circuit breaker
ALP43 Evaporator	2 magnet circuit breaker
ALP44		Condenser pump 1 no flow warning
ALP45		Condenser pump 2 no flow warning
ALP46 Condenser	1 no flow
ALP47		Condenser pump 2 no flow
ALP48 Circuit 1 at	ze alarm
ALP48		Circuit 2 anti-freeze alarm
ALP48 Circuit 3 at	ze alarm
ALP48		Circuit 4 anti-freeze alarm
ALP49 Circuit 1-2	zeze alarm
Codice allarme Riarmo Descrizione
ALP49		Allarme antigelo circuito 3-4
ALC50 Allarme an unità
ALC51		Avviso prevenzione alta pressione circuito 1
ALC51 Avviso prev e bassa pressione circuito 1
ALC51		Avviso prevenzione antigelo circuito 1
ALC52 Avviso prev e alta pressione circuito 2
ALC52 Avviso prev e bassa pressione circuito 2
ALC52		Avviso prevenzione antigelo circuito 2
ALC53 Avviso prev e alta pressione circuito 3
ALC53		Avviso prevenzione bassa pressione circuito 3
ALC53 Avviso prev e antigelo circuito 3
ALC54		Avviso prevenzione alta pressione circuito 4
ALC54 Avviso prev e bassa pressione circuito 4
ALC54		Avviso prevenzione antigelo circuito 4
ALC55		Avviso prevenzione antigelo circuiti 1-2
ALC55 Avviso prev e antigelo circuiti 3-4
ALC56		Avviso prevenzione antigelo unità
AL57 Allarme pCO e
AL58		Allarme sonda 1 pCOe guasta
AL59 Allarme son COe guasta
AL60		Allarme sonda 3 pCOe guasta
AL61 Allarme son COe guasta
Alarm code Rearm Description
AL62		I/O mismatch alarm
AL63		Condenser pump 1 magnet circuit breaker alarm
AL64		Condenser pump 2 magnet circuit breaker alarm

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Technical data shown in this booklet are not binding.

Aermec S.p.A. shall have the right to introduce at any time whatever modifications deemed necessary to the improvement of the product.